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volume controll in the feedback loop
volume controll in the feedback loop
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Old 11th July 2004, 03:19 PM   #21
jan.didden is offline jan.didden  Europe
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Sam,

Do you have a schematic diagram of the switching thing?

Jan Didden
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Old 11th July 2004, 04:09 PM   #22
sam9 is offline sam9  United States
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janneman,

This ia all I have:
www.accuphase.com/pdf/p-5000_3.pdf

There is a schematic of sorts but I doubt it has the details you want. In any case, I would think it could be done by simply switching the Lower Arm resistor. The biggest concern would be the physical signal path as that is a potential entry point for noise and cross talk.
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Old 11th July 2004, 08:51 PM   #23
jleaman is offline jleaman  Belgium
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link doesn't work.
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Old 11th July 2004, 09:55 PM   #24
djk is offline djk
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SAE used feedback loop gain switching in several of their models.

http://wardsweb.org/audio/docs/MK%20...schematic1.jpg

Not the best scan, but readable.

Note that the lower arm resistor is 1K8 with the switched values in parallel with this, if the switch fails it goes to a low gain state.
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Old 11th July 2004, 10:11 PM   #25
dhaen is offline dhaen  Europe
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Quote:
Originally posted by JasonL
link doesn't work.
Try this:


http://www.accuphase.com/pdf/p-5000_e.pdf
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